Question

问题：当用户开始游戏时，他有6个单词可供选择，这6个单词是从列表中随机选择的。但是，每次用户关闭此活动然后再次重新打开它时，会出现一组不同的六个单词。

这就是我试图解决这个问题的方法：

public class GameActivity extends Activity {
    protected static ArrayList<String> mSavedList;
    protected TextView word1;
    protected LinkedList<String> mCopy;
    protected TextView word2;
     /// all the way to word6

    @Override
   protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_game);

    if (savedInstanceState != null) {
        mSavedList = savedInstanceState.getStringArrayList("savedList");

         word1 = (TextView) findViewById(R.id.word1);
         word1.setText(mSavedList.get(1));

        word2 = (TextView) findViewById(R.id.word2);
        word2.setText(mSavedList.get(2));
         //up until word6

     }

   else {
    //take the list of all the words in the LinkedList mCopy, 
     randomize it, and pick the first         six.

   }

}// end of onCreate method 

  @Override
   public void onSaveInstanceState(Bundle savedInstanceState) {
    mSavedList = new ArrayList<String>(mCopy.subList(1, 7));
    savedInstanceState.putStringArrayList("savedList", mSavedList);

    super.onSaveInstanceState(savedInstanceState);
}

当我运行代码时，我的应用程序不会崩溃，它只是继续表现得好像没有创建捆绑包。我不知道我做错了什么。

Answer 1

嗨，我编辑代码，请看下面的内容

mSavedList = new ArrayList（mCopy.subList（1,7））;

如果savedInstanceState为null，则只能生成随机数。还有一个从arrray列表中删除静态使其正常

public class GameActivity extends Activity {
    protected ArrayList<String> mSavedList;
    protected TextView word1;
    protected LinkedList<String> mCopy;
    protected TextView word2;
     /// all the way to word6

    @Override
   protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_game);

    if (savedInstanceState != null) {
        mSavedList = savedInstanceState.getStringArrayList("savedList");

         word1 = (TextView) findViewById(R.id.word1);
         word1.setText(mSavedList.get(1));

        word2 = (TextView) findViewById(R.id.word2);
        word2.setText(mSavedList.get(2));
         //up until word6

     }

   else {
    //take the list of all the words in the LinkedList mCopy, 
     randomize it, and pick the first         six.
        mSavedList = new ArrayList<String>(mCopy.subList(1, 7));
   }

}// end of onCreate method 

  @Override
   public void onSaveInstanceState(Bundle savedInstanceState) {
    savedInstanceState.putStringArrayList("savedList", mSavedList);
    super.onSaveInstanceState(savedInstanceState);
}

无法在活动重启时检索捆绑：app就像捆绑包不存在一样

1 个答案: